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Correlation between Results of Preoperative Impingement Test and Clinical Outcomes after Arthroscopic Rotator Cuff Repair
Clinics in Shoulder and Elbow 2017;20:126-132
Published online September 30, 2017
© 2017 Korean Shoulder and Elbow Society.

Sung Bae Park, Joong Bae Seo, Jee Won Ryu, Yong Eun Shin

Department of Orthopedic Surgery, Dankook University Medical College, Cheonan, Korea
Correspondence to: Joong Bae Seo
Department of Orthopedic Surgery, Dankook University Medical College, Kinesiologic Medical Science, Dankook University Graduate School, 119 Dandae-ro, Dongnam-gu, Cheonan 31116, Korea
Tel: +82-41-550-3060, Fax: +82-41-556-0551, E-mail: ssjb1990@dku.edu
Received March 18, 2017; Revised July 23, 2017; Accepted July 30, 2017.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
Background: The aim of the present study was to determine the correlation between the amount of pain reduction after local anesthetic injection into the subacromial space preoperatively and clinical outcome after arthroscopic rotator cuff repair.
Methods: A total of 127 patients who underwent arthroscopic rotator cuff repair and followed up at least 1 year were analyzed retrospectively. Preoperatively, a visual analogue scale (VAS) for pain was measured in all patients before and after the ultrasound guided impingement test. The participants were divied into four groups according to pain reduntion ater impingement test (Group A: >75%, Group B: 50%–75%, Group C: 25%–50%, Group D: <25%). VAS for pain, shoulder range of motion, shoulder isometric strength, ASES score were evaluated preoperatively and at 3, 6, 9, and 12 months postoperatively.
Results: After surgery, the amount of pain reduction shows significantly at 3, 6 months in Groups A, B as compared to Groups C, D (p<0.05). Among the range of motion of shoulder joint, forward flexion was significantly improved in Group A at 3 months (p<0.05). The ASES score significantly improved at 3, 6 months in Groups A, B as compared to Group C, D (p<0.05).
Conclusions: Preoperative degree of pain reduction after impingement test correlates with the improvement of pain after arthroscopic rotator cuff repair, especially in the early phase. Therefore, the impingement test could be effectively used.
Keywords : Shoulder; Impingement test; Rotator cuff tear; Pain